collection_select NoMethodError - 切换到 rails 3.2.11 后注意到

Question

更新到 rails 3.2.11 后，我注意到我的应用程序中的搜索表单存在问题。看到“我们很抱歉，但出了点问题”后。 Heroku 上的消息，我检查了日志并注意到以下错误消息：

NoMethodError (undefined method `to_i' for ["2010"]:Array):
app/controllers/skis_controller.rb:29:in `index'

这是指显示我的搜索结果的索引控制器。我对实际搜索表单使用了部分搜索表单，其中包含几个 collection_selects。

索引操作中的第 29 行指的是 model_year（上面搜索中的“2010”）。当我从 collection_select 中删除 model_year 字段时，一切正常（搜索后没有错误消息）。这就是 model_year collection_select 的样子：

<%= collection_select(:ski, :model_year, @model_years.sort_by(&:model_year).reverse, :model_year, :model_year, {}, :multiple => true, :class => "chzn-select", :'data-placeholder' => "Enter Model Year") %>

这让我很烦，因为它在过去三周内一直运行良好。我最近更新到 rails 3.2.11 但我不肯定这是问题开始的时候（我知道我之前没有注意到它）。我查看了 collection_select 文档，一切似乎都很好。

model_year 以整数形式存储在数据库中，我已通过 rails 控制台确认了这一点。

任何帮助或想法将不胜感激！谢谢

编辑 - 更新添加控制器代码：

def index

  @companies = Brand.scoped
  @ski_types = Ski.find(:all, :select => "DISTINCT ski_type")
  @genders = Ski.find(:all, :select => "DISTINCT gender")
  @names = Ski.find(:all, :select => "DISTINCT name")
  @price_ranges = PriceRange.scoped
  @model_years = Ski.find(:all, :select => "DISTINCT model_year")
  @sorts = ["Price", "Rating", "Availability"]

if params[:ski].present? || params[:brand].present? || params[:price_range].present?
# Creates references for collection select

  ski_type = params[:ski][:ski_type].reject(&:blank?)
  gender = params[:ski][:gender].reject(&:blank?)
  company = params[:brand][:company].reject(&:blank?)
  name = params[:ski][:name].reject(&:blank?)
  price_range = params[:price_range][:price_range]
  model_year = params[:ski][:model_year].reject(&:blank?)
  # raise ski_type.any?.inspect

  @ski = Ski.new
  @ski.ski_type = ski_type
  @ski.gender = gender
  @ski.name = name
  @ski.model_year = model_year

  @price_range = PriceRange.new
  @price_range.price_range = price_range

  @brand = Brand.new
  @brand.company = company

  skis = Inventory.search_price(price_range)

  skis_refined = Ski.search_characteristics(ski_type, gender, company, name, model_year)

  ski_ids2 = skis.map(&:id) & skis_refined.map(&:id)

  @all_skis = Ski.where(:id => ski_ids2)

  if params[:sort_by] == "Price Low to High"
    @overlapping_skis = Kaminari.paginate_array(@all_skis.joins(:inventories).order("inventories.price ASC").uniq_by(&:id)).page(params[:page]).per(30)
  elsif params[:sort_by] == "Price High to Low"
    @overlapping_skis = Kaminari.paginate_array(@all_skis.joins(:inventories).order("inventories.price DESC").uniq_by(&:id)).page(params[:page]).per(30)
  elsif params[:sort_by] == "Rating"
    @overlapping_skis = Kaminari.paginate_array(@all_skis.joins(:reviews).order("reviews.average_review DESC").uniq_by(&:id)).page(params[:page]).per(30)
  else
    @overlapping_skis = @all_skis.joins(:brand).order("brands.company ASC, skis.model_year DESC, skis.name ASC").page(params[:page])
  end

else
  @overlapping_skis = Ski.joins(:brand).order("brands.company ASC, skis.model_year DESC, skis.name ASC").page(params[:page])
end


respond_to do |format|
  format.html # index.html.erb
  format.json { render json: @skis }
end
end

搜索方法更新：

def self.search_characteristics(ski_type, gender, company, name, model_year)
@skis = Ski.scoped
if ski_type.any?
    @skis = @skis.where(:ski_type => ski_type)
end
if gender.any?
  @skis = @skis.where(:gender => gender)
end
if company.any?
  brand_object = Brand.where(:company => company)

  @id_array = brand_object.map(&:id)

  @skis = @skis.where(:brand_id => @id_array)
end
if name.any?
  @skis = @skis.where(:name => name)
end
if model_year.any?
  @skis = @skis.where(:model_year => model_year)
end
return @skis
 end

Answer 1

您有:multiple => true，这意味着model_year 可以有多个选定值，这就是它是一个数组的原因。您必须以某种方式处理这些多个值或删除 :multiple => true。